-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 John Antypas wrote: > This has probably been asked thousands of times before, but I?ll try to > be a good 1001 J > > > > I?m trying to write some userspace code which can determine what LV, VG > and PV a givne file mout belongs to. Yes, I can process the output of a > few command lines tools like this: > > > > 1. Get the mount from /proc/mounts > > 2. Run lvs and map that into the LVM > > 3. Using the LVM, run vgs and get the VG > > 4. Using VG, use pvs and get the PV > > 5. Using PV, now some knowledge about how I set things up and get > the md > > 6. Run around proc some more and figure out which disks this md is on > > > > These utilities do it ? is there an API I can call to do all of this > tracing down rather than processing shell processes? > You can use liblvm2cmd to get this information (the header is normally /usr/include/lvm2cmd.h). This allows you to run LVM2 commands through a library interface, although you will still need to parse the output as it is the same textual format as the commands themselves provide. On a recent enough kernel though, all the information you are interested in is exposed directly in sysfs. Take a look at the "holders" and "slaves" entries in subdirectories of /sys/block. There is also a library interface (libsysfs) that provides access to the keys & values exposed here. Regards, Bryn. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFGMblW6YSQoMYUY94RAkgHAKDCwMM8R8H4H72Hpr8lsTHgyLxv8wCgsX6f lBGTn0VeYA0M/4uTNHDr+j4= =B9i/ -----END PGP SIGNATURE----- _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
